It is clearly stated here that oṁ, Brahman and Lord Kṛṣṇa are not different. The impersonal sound of Kṛṣṇa is oṁ, but the sound Hare Kṛṣṇa contains oṁ. The chanting of the Hare Kṛṣṇa mantra is clearly recommended for this age. So if one quits his body at the end of life chanting Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare, he certainly reaches one of the spiritual planets, according to the mode of his practice. The devotees of Kṛṣṇa enter the Kṛṣṇa planet, Goloka Vṛndāvana. For the personalists there are also innumerable other planets, known as Vaikuṇṭha planets, in the spiritual sky, whereas the impersonalists remain in the brahma-jyotir.
(Bhagavad-Gita------8:13------purport).

And from Brahmā all the seven great sages, and before them four other great sages, named Sanaka, Sananda, Sanātana and Sanat-kumāra, and the fourteen Manus, are manifested. All these twenty-five great sages are known as the patriarchs of the living entities all over the universe. There are innumerable universes and innumerable planets within each universe, and each planet is full of population of different varieties. All of them are born of these twenty-five patriarchs. Brahmā underwent penance for one thousand years of the demigods before he realized by the grace of Kṛṣṇa how to create. Then from Brahmā came Sanaka, Sananda, Sanātana and Sanat-kumāra, then Rudra, and then the seven sages, and in this way all the brāhmaṇas and kṣatriyas are born out of the energy of the Supreme Personality of Godhead. Brahmā is known as Pitāmaha, the grandfather, and Kṛṣṇa is known as Prapitāmaha, the father of the grandfather. That is stated in the Eleventh Chapter of the Bhagavad-gītā (11.39).
(Bhagavad-Gita------10:6------purport).

There are innumerable material universes, and in each and every universe there are innumerable planets inhabited by different grades of living entities in different modes of nature. The Lord (Viṣṇu) incarnates Himself in each and every one of them and in each and every type of living society. He manifests His transcendental pastimes amongst them just to create the desire to go back to Godhead. The Lord does not change His original transcendental position, but He appears to be differently manifested according to the particular time, circumstances and society.
Sometimes He incarnates Himself or empowers a suitable living being to act for Him, but in either case the purpose is the same: the Lord wants the suffering living being to go back home, back to Godhead. The happiness which the living beings are hankering for is not to be found within any corner of the innumerable universes and material planets. The eternal happiness which the living being wants is obtainable in the kingdom of God, but the forgetful living beings under the influence of the material modes have no information of the kingdom of God.
(Srimad Bhagavatam-----1:2:34------purport).

In the Śruti-mantra it is said that only Viṣṇu, the Supreme Lord, existed before the creation, and there was no Brahmā, Śiva or other demigods. Viṣṇu means the Mahā-viṣṇu, who is lying on the Causal Ocean. By His breathing only all the universes are generated in seeds and gradually develop into gigantic forms with innumerable planets within each and every universe. The seeds of universes develop into gigantic forms in the way seeds of a banyan tree develop into numberless banyan trees.
This Mahā-viṣṇu is the plenary portion of the Lord Śrī Kṛṣṇa, who is mentioned in the Brahma-saṁhitā as follows:
"Let me offer my respectful obeisances unto the original Personality of Godhead, Govinda, whose plenary portion is the Mahā-viṣṇu. All the Brahmās, the heads of the universes, live only for the period of His exhaling, after the universes are generated from the pores of His transcendental body." (Bs. 5.48)
(Srimad Bhagavatam-----1:10:21------purport).

When one is thus inclined to become an associate of the Supreme Lord, the Personality of Godhead, in one of the innumerable planets of the spiritual sky, especially in Goloka Vṛndāvana, one has to think always that he is different from the material energy; he has nothing to do with it, and he has to realize himself as pure spirit, Brahman, qualitatively equal with the Supreme Brahman (Parameśvara). Mahārāja Yudhiṣṭhira, after distributing his kingdom to Parīkṣit and Vajra, did not think himself Emperor of the world or head of the Kuru dynasty. This sense of freedom from material relations, as well as freedom from the material encagement of the gross and subtle encirclement, makes one free to act as the servitor of the Lord, even though one is in the material world. This stage is called the jīvan-mukta stage, or the liberated stage, even in the material world.
(Srimad Bhagavatam-----1:15:42------purport).

Materialistic men can think, although very imperfectly, of the huge universal space, comprehending an innumerable number of planets as big as the sun. They can see only the circular sky overhead, without any information that this universe, as well as many other hundreds of thousands of universes, are each covered by sevenfold material coverings of water, fire, air, sky, ego, noumenon and material nature, just like a huge football, pumped and covered, floating on the water of the Causal Ocean, wherein the Lord is lying as Mahā-viṣṇu. All the universes in seed are emanating from the breathing of the Mahā-viṣṇu, who is but part of a partial expansion of the Lord, and all the universes presided over by the Brahmās vanish when the Mahā-viṣṇu withdraws His great breath. In this way, the material worlds are being created and vanished by the supreme will of the Lord. The poor foolish materialist can just imagine how ignorantly he puts forward an insignificant creature to become His rival incarnation, simply on the allegations of a dying man.
(Srimad Bhagavatam-----2:1:25------purport).

He is not even satisfied with available amenities on this planet earth, where he has exploited the resources of nature to the best of his ability. He wants to go to the moon or the planet Venus to exploit resources there. But the Lord has warned us in the Bhagavad-gītā (8.16) about the worthlessness of all the innumerable planets of this universe, as well as those planets within other systems. There are innumerable universes and also innumerable planets in each of them. But none of them is immune to the chief miseries of material existence, namely the pangs of birth, the pangs of death, the pangs of old age and the pangs of disease. The Lord says that even the topmost planet, known as the Brahmaloka or Satyaloka, (and what to speak of other planets, like the heavenly planets) is not a happy land for residential purposes, due to the presence of material pangs, as above mentioned.
(Srimad Bhagavatam-----2:2:2------purport).

"He said that he felt that the gaseous composition of Martian atmosphere was quite suitable to sustain life of beings which have become adapted to it."
This adaptability of an organism to different varieties of planets is described in the Brahma-saṁhitā as vibhūti-bhinnam; i.e., each and every one of the innumerable planets within the universe is endowed with a particular type of atmosphere, and the living beings there are more perfectly advanced in science and psychology because of a better atmosphere. Vibhūti means "specific powers," and bhinnam means "variegated." Scientists who are attempting to explore outer space and are trying to reach other planets by mechanical arrangements must know for certain that organisms adapted to the atmosphere of earth cannot exist in the atmospheres of other planets (Easy Journey to Other planets).
(Srimad Bhagavatam-----2:4:8------purport).

Lord Brahmā is the first demigod, and Hiraṇyākṣa is the first demon in this universe. Only under certain conditions do the planets float as weightless balls in the air, and as soon as these conditions are disturbed, the planets may fall down in the Garbhodaka Ocean, which covers half the universe. The other half is the spherical dome within which theinnumerable planetary systems exist. The floating of the planets in the weightless air is due to the inner constitution of the globes, and the modernized drilling of the earth to exploit oil from within is a sort of disturbance by the modern demons and can result in a greatly harmful reaction to the floating condition of the earth. A similar disturbance was created formerly by the demons headed by Hiraṇyākṣa (the great exploiter of the gold rush), and the earth was detached from its weightless condition and fell down into the Garbhodaka Ocean.
(Srimad Bhagavatam-----2:7:1------purport).

There are innumerable rulers all over the universe in different varieties of planets: the sun-god in the sun planet, the moon-god in the moon planet, Indra in the heavenly planet, Vāyu, Varuṇa, and those in the Brahmaloka planet, where Lord Brahmā is living. All are obedient servants of the Lord. Whenever there is any trouble in the administration of the innumerable planets in different universes, the rulers pray for an appearance, and the Lord appears. The Bhāgavatam (1.3.28) has already confirmed this in the following verse:
ete cāṁśa-kalāḥ puṁsaḥ
kṛṣṇas tu bhagavān svayam
indrāri-vyākulaṁ lokaṁ
mṛḍayanti yuge yuge
In every millennium, whenever there is any trouble for the obedient rulers, the Lord appears. He also appears for the sake of His pure unalloyed devotees. The surrendered rulers and the pure devotees are always strictly under the control of the Lord, and they are never disobedient to the desires of the Lord. The Lord is therefore always attentive to them.
(Srimad Bhagavatam-----3:1:45------purport).

This universe, or the universal sky which we can visualize with its innumerable planets, is shaped just like an egg. As an egg is covered by a shell, the universe is also covered by various layers. The first layer is water, the next is fire, then air, then sky, and the ultimate holding crust is pradhāna. Within this egglike universe is the universal form of the Lord as the virāṭ-puruṣa. All the different planetary situations are parts of His body. This is already explained in the beginning of Śrīmad-Bhāgavatam, Second Canto. The planetary systems are considered to form different bodily parts of that universal form of the Lord. Persons who cannot directly engage in the worship of the transcendental form of the Lord are advised to think of and worship this universal form. The lowest planetary system, Pātāla, is considered to be the sole of the Supreme Lord, and the earth is considered to be the belly of the Lord. Brahmaloka, or the highest planetary system, where Brahmā lives, is considered to be the head of the Lord.
(Srimad Bhagavatam-----3:26:52------purport).

The word sarva-loka-namaskṛtam means that He is worshipable by everyone on every planet. There are innumerable planets in the material world and innumerable planets in the spiritual world as well. On each planet there are innumerable inhabitants who worship the Lord, for the Lord is worshipable by all but the impersonalists. The Supreme Lord is very beautiful. The word śaśvat is significant. It is not that He appears beautiful to the devotees but is ultimately impersonal. Śaśvat means "ever existing." That beauty is not temporary. It is ever existing—He is always youthful. In the Brahma-saṁhitā (5.33) it is also stated: advaitam acyutam anādim ananta-rūpam ādyaṁ purāṇa-puruṣaṁ nava-yauvanaṁ ca. The original person is one without a second, yet He never appears old; He always appears as ever fresh as a blooming youth.
(Srimad Bhagavatam-----3:28:17------purport).

It is understood from this verse that all the planets in outer space are floating, and they all hold living entities. The word śvasatām means "those who breathe," or the living entities. In order to accommodate them, there are innumerable planets. Every planet is a residence for innumerable living entities, and the necessary space is provided in the sky by the supreme order of the Lord. It is also stated here that the total universal body is increasing. It is covered by seven layers, and as there are five elements within the universe, so the total elements, in layers, cover the outside of the universal body. The first layer is of earth, and it is ten times greater in size than the space within the universe; the second layer is water, and that is ten times greater than the earthly layer; the third covering is fire, which is ten times greater than the water covering. In this way each layer is ten times greater than the previous one.
(Srimad Bhagavatam-----3:29:43------purport).

In the Brahma-saṁhitā it is said that the unlimited impersonal Brahman is the effulgence of the transcendental body of Govinda. In that unlimited effulgent aura of the Supreme Personality of Godhead there are innumerable universes with innumerable planets of different categories. Although the Supreme Person is the original cause of all causes, His impersonal effulgence, known as Brahman, is the immediate cause of the material manifestation. Dhruva Mahārāja, therefore, offered his respectful obeisances unto the impersonal feature of the Lord. One who realizes this impersonal feature can enjoy the unchangeable brahmānanda, described here as spiritual bliss.
(Srimad Bhagavatam-----4:9:16------purport).

Now, the demigods, the devotees, would immediately accept this incident, knowing that the Lord can lift anything, however heavy it might be. But although demons were also carried along with the demigods, demons, upon hearing of this incident, would say that it is mythological. But if God is all-powerful, why would it be difficult for Him to lift a mountain? Since He is floating innumerable planets with many hundreds and thousands of Mandara Mountains, why can't He lift one of them with His hand? This is not mythology, but the difference between the believers and the faithless is that the devotees accept the incidents mentioned in the Vedic literatures to be true, whereas the demons simply argue and label all these historical incidents mythology. Demons would prefer to explain that everything happening in the cosmic manifestation takes place by chance, but demigods, or devotees, never consider anything to be chance. Rather, they know that everything is an arrangement of the Supreme Personality of Godhead.
(Srimad Bhagavatam-----8:6:38------purport).

Such devotees of the Lord never think of the Lord as the Supreme, but think of Him exactly as a common friend, a pet son, or a lover or husband very much dear to heart and soul. That is the relation between the Lord and His transcendental devotees, who act as His associates in the spiritual sky, where there are innumerable Vaikuṇṭha planets. When the Lord descends, He does so along with His entourage to display a complete picture of the transcendental world, where pure love and devotion for the Lord prevail without any mundane tinge of lording it over the creation of the Lord. Such devotees of the Lord are all liberated souls, perfect representations of the marginal or internal potency in complete negation of the influence of the external potency. The wives of Lord Kṛṣṇa were made to forget the immeasurable glories of the Lord by the internal potency so that there might not be any flaw of exchange, and they took it for granted that the Lord was a henpecked husband, always following them in lonely places. In other words, even the personal associates of the Lord do not know Him perfectly well, so what do the thesis writers or mental speculators know about the transcendental glories of the Lord?
(Srimad Bhagavatam-----1:11:39------purport).

Beyond the material sky, further than we can see with our eyes and beyond the sevenfold coverings of the universe, there is the Causal Ocean in which all the universes are floating like footballs, and beyond the Causal Ocean there is an unlimited span of spiritual sky generally known as the effulgence of Brahman. Within this effulgence there areinnumerable spiritual planets, and they are known as the Vaikuṇṭha planets. Each and every Vaikuṇṭha planet is many, many times bigger than the biggest universe within the material world, and in each of them there are innumerable inhabitants who look exactly like Lord Viṣṇu. These inhabitants are known as the Mahā-pauruṣikas, or persons directly engaged in the service of the Lord. They are happy in those planets and are without any kind of misery, and they live perpetually in full youthfulness, enjoying life in full bliss and knowledge without fear of birth, death, old age or disease, and without the influence of kāla, eternal time.
(Srimad Bhagavatam-----1:14:35-36------purport).

For a devotee like Mahārāja Parīkṣit, none of the material planets, even the topmost Brahmaloka, is as desirable as Goloka Vṛndāvana, the abode of Lord Śrī Kṛṣṇa, the primeval Lord and original Personality of Godhead. This earth is one of the innumerable material planets within the universe, and there are innumerable universes also within the compass of the mahat-tattva. The devotees are told by the Lord and His representatives, the spiritual masters or ācāryas, that not one of the planets within all the innumerable universes is suitable for the residential purposes of a devotee. The devotee always desires to go back home, back to Godhead, just to become one of the associates of the Lord in the capacity of servitor, friend, parent or conjugal lover of the Lord, either in one of the innumerable Vaikuṇṭha planets or in Goloka Vṛndāvana, the planet of Lord Śrī Kṛṣṇa.
(Srimad Bhagavatam-----1:19:5------purport).

As we have explained before, the impersonal Brahman effulgence is only a part of the Personality of Godhead. Impersonal Brahman is situated on the person of the Supreme Personality of Godhead, and as such, Brahman is the glorification of the personality of the Godhead. This is confirmed both in the Bhagavad-gītā and in the Matsya Purāṇa. Gati refers to the ultimate destination, or the last word in liberation. Oneness with the impersonal brahma-jyotir is not ultimate liberation; superior to that is the sublime association of the Personality of Godhead in one of the innumerable spiritual planets in the Vaikuṇṭha sky. Therefore the conclusion is that Nārāyaṇa, or the Personality of Godhead, is the ultimate destination for all kinds of yoga systems as well as all kinds of liberation.
(Srimad Bhagavatam-----2:5:16------purport).

Every incarnation of the Lord has His own abode in the spiritual sky. Therefore Lord Kapila also has His separate Vaikuṇṭha planet. The spiritual sky is not void. There are innumerable Vaikuṇṭha planets, and in each of them the Lord, by His innumerable expansions, predominates, and the pure devotees who are there also live in the same style as the Lord and His eternal associates.
When the Lord descends personally or by His personal plenary expansions, such incarnations are called aṁśa, kalā, guṇa, yuga and manvantara incarnations, and when the Lord's associates descend by the order of the Lord, such incarnations are called śaktyāveśa incarnations. But in all cases all the incarnations are supported by the invulnerable statements of the authorized scriptures, and not by any imagination of some self-interested propagandist. Such incarnations of the Lord, in either of the above categories, always declare the Supreme Personality of Godhead to be the ultimate truth. The impersonal conception of the supreme truth is just a process of negation of the form of the Lord from the mundane conception of the supreme truth.
(Srimad Bhagavatam-----2:7:3------purport).

If one takes a fish from the water and puts it on the land, it cannot be made happy by any amount of offered pleasure. The spirit soul can be happy only in the association of the supreme living being, the Personality of Godhead, and nowhere else. The Lord, by His unlimited causeless mercy, has innumerable Vaikuṇṭha planets in the brahma-jyotir sphere of the spiritual world, and in that transcendental world there is an unlimited arrangement for the unlimited pleasure of the living entities.
The Lord Himself comes to display His transcendental pastimes, typically represented at Vṛndāvana, Mathurā and Dvārakā. He appears just to attract the conditioned souls back to Godhead, back home to the eternal world. But for want of sufficient piety, the onlookers are not attracted by such pastimes of the Lord. In Bhagavad-gītā it is said that only those who have completely surpassed the way of sinful reaction can engage themselves in the transcendental loving service of the Lord.
(Srimad Bhagavatam-----3:2:11------purport).

When a devotee is promoted to the spiritual world, Vaikuṇṭha, he receives four kinds of facilities. One of these is sālokya, living on the same planet as the Supreme Personality. The Supreme Person, in His different plenary expansions, lives on innumerable Vaikuṇṭha planets, and the chief planet is Kṛṣṇaloka. Just as within the material universe the chief planet is the sun, in the spiritual world the chief planet is Kṛṣṇaloka. From Kṛṣṇaloka, the bodily effulgence of Lord Kṛṣṇa is distributed not only to the spiritual world but to the material world as well; it is covered by matter, however, in the material world. In the spiritual world there are innumerable Vaikuṇṭha planets, and on each one the Lord is the predominating Deity. A devotee can be promoted to one such Vaikuṇṭha planet to live with the Supreme Personality of Godhead.
(Srimad Bhagavatam-----3:29:13------purport).